What language would be good for me to learn?

german would be the most useful; it is a lot more widely spoken than the other languages you listed. im half german and i'll be in french 3 this year by the wayy(: and you don't really roll your r's in german, it's kind of this gutteral and roll and english r sound...it's weird. i think you'd be fine with pronunciation, unless you have a spanish accent even when you speak english or french. then i suggest getting rid of that before learning another language.